| msg177317 - (view) |
Author: ashwani (nixdash) |
Date: 2012-12-10 23:52 |
| Hello, I did a local installation of python 3.3.0 on my organization's CentOS machine. We also have Python 2.6.6 installed for every users on this machine. Python 3.3.0 crashes when I import the hash lib. Following is snapshot of the crash. ir[63] [~/]$ python3 -X faulthandler Python 3.3.0 (default, Dec 9 2012, 20:13:58) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import hashlib Fatal Python error: Segmentation fault Current thread 0x00007f0362784700: File "/usa/arao/Python-3.3.0/lib/python3.3/hashlib.py", line 99 in __get_openssl_constructor File "/usa/arao/Python-3.3.0/lib/python3.3/hashlib.py", line 141 in File "<frozen importlib._bootstrap>", line 313 in _call_with_frames_removed File "<frozen importlib._bootstrap>", line 869 in _load_module File "<frozen importlib._bootstrap>", line 562 in module_for_loader_wrapper File "<frozen importlib._bootstrap>", line 1004 in load_module File "<frozen importlib._bootstrap>", line 1023 in load_module File "<frozen importlib._bootstrap>", line 586 in _check_name_wrapper File "<frozen importlib._bootstrap>", line 1525 in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 1558 in _find_and_load File "", line 1 in Segmentation fault Can someone help me on this? Thanks, Ashwin |
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| msg177318 - (view) |
Author: ashwani (nixdash) |
Date: 2012-12-10 23:56 |
| Following is the behavior on the same machine with Python 2.6.6 ir[65] [~/]$ python Python 2.6.6 (r266:84292, Dec 7 2011, 20:48:22) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import hashlib >>> |
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| msg177324 - (view) |
Author: Gregory P. Smith (gregory.p.smith) *  |
Date: 2012-12-11 07:36 |
| Given where the crash is occurring and that faulthandler traceback it makes me wonder if it was compiled with a set of openssl headers that don't make the library it is using at runtime. If you recompile the interpreter in debug mode (--with-pydebug on your ./configure) does it still happen? Can you run it under gdb and get the C stacktrace? that'll tell more than faulthandler alone does. [I'm glad to see you're using faulthandler though!] |
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| msg177392 - (view) |
Author: ashwani (nixdash) |
Date: 2012-12-12 22:57 |
| Ok , It did not crash when I recompiled with --with-pydebug. I observed crash when I was working with the urllib.request. It was crashing when I imported urllib.request. I drill down the code of urllib.request and found that it was crashing because of hashlib import. Now, it is not crashing when I import hashlib and urllib.request. But urllib.request.urlopen fails to open a site. It does open few other sites. Now this might be completely different issue. I think we first need to find why it is not crashing after the recompilation. Following is comparison of urlopen on the same machine using two different python versions. ir[40] [~/Python-3.3.0/]$ python3 Python 3.3.0 (default, Dec 12 2012, 17:26:56) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import hashlib [71516 refs] >>> import urllib [71550 refs] >>> import urllib.request [123410 refs] >>> u = urllib.request.urlopen('http://en.wikipedia.org/wiki/Wikipedia') ]Traceback (most recent call last): File "", line 1, in File "/usa/arao/Python-3.3.0/lib/python3.3/urllib/request.py", line 160, in urlopen return opener.open(url, data, timeout) File "/usa/arao/Python-3.3.0/lib/python3.3/urllib/request.py", line 479, in open response = meth(req, response) File "/usa/arao/Python-3.3.0/lib/python3.3/urllib/request.py", line 591, in http_response 'http', request, response, code, msg, hdrs) File "/usa/arao/Python-3.3.0/lib/python3.3/urllib/request.py", line 517, in error return self._call_chain(*args) File "/usa/arao/Python-3.3.0/lib/python3.3/urllib/request.py", line 451, in _call_chain result = func(*args) File "/usa/arao/Python-3.3.0/lib/python3.3/urllib/request.py", line 599, in http_error_default raise HTTPError(req.full_url, code, msg, hdrs, fp) urllib.error.HTTPError: HTTP Error 403: Forbidden [126943 refs] >>> u = urllib.request.urlopen('http://mit.edu/') [127082 refs] >>> len(u.read()) 13857 [127068 refs] It does open some other sites. r[37] [~/Python-3.3.0/]$ python Python 2.6.6 (r266:84292, Dec 7 2011, 20:48:22) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import urllib >>> u = urllib.urlopen('http://en.wikipedia.org/wiki/Wikipedia') >>> len(u.read()) 3000 >>> import hashlib >>> Thanks, Ashwin |
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| msg177397 - (view) |
Author: Gregory P. Smith (gregory.p.smith) * |
Date: 2012-12-13 00:57 |
| given the behavior you are seeing, I'm not inclined to trust your computer or however it is configured. I do not believe this is a Python issue. 3.3 works fine on RHEL 6 so it should work fine on CentOS 6. http://buildbot.python.org/all/builders/x86%20RHEL%206%203.3 next steps as far as debugging the crash goes still stand: run python under gdb and get the C stacktrace from the crash. |
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